Swivel joint for sucker rods



Nov. 25', 1924.

D. PRIDGEN SWIVELy JOINT FOR SUCKER RODS Filed Oct. ISO. 1923 2Sheets-Sheet l V////,//////// vvuvvvhm// Snowdon lnah D. F11-Ld en No'v.25, 19?@o 1,516,891

' J. D. PRIDGEN n SWIVEL JOINT FOR SUCKER'RODS Filed Oct. 30 1923 2Sheets-Sheet 2 Patented Nov. 25', 1924.

UNITED STATESy JOSIH DAVID PBIDGEN, 0F SMACXOVEB, ARKANSAS.

SWIVEL JOINT FOB SUCKEB RODS.

Applica. u ctober 30, 1923. Seria] I0. 071,741.

To all whom. t may concern:

Be it known that I, JosiAH D. PRmGnN, a citizen of the United States,Smackover, in the county of Union and State of Arkansas, have inventedcertain new and useful Improvements in a Swivel Joint for Sucker Rods,of which the followin is a specification.

he present invention relates to oil well pumps and more particularly tothe construction of a sucker rod joint or connection.

An object of the (present invention is to provide an improve joint forsucker rods wherein one, two, three or'more may be used in string orchain fashion according to the depth of the well and the alignment ofthe hole or opening.

Another object of the invention is to provide a connection of this typewhich forms a swivel so that the sections of the sucker rod may freelyand relatively turn one upon the other while in motion and thus preventthe rods and other parts from wearing Hat sided and to prevent the rodsand boxes from wearing holes in the tubing as is often the case when thewell hole is crooked.

A further object' of the invention is to provide a swivel connection ofthis type which mayv be easily and quickly repaired and wherein theparts may be renewed and replaced in a relatively short space of time.

The above and various other objects and advanta es of this inventionwill in part be describe in and inl part be understood from thefollowing detailed description of the present preferred embodiment, thesame being illustrated in the accompanying drawingz wherein: u

ig. lis a slde elevation of a portion of a sucker rod constructedaccording to the present invention.

Fig. 2 is a longitudinal section taken through the same axially at rightangles to the showing in Fig. 1.

Fig. 3 is a transverse section taken on the line 3-3 of Fig. 2.

Fig. 4 is a similar view taken on the line 4-4 of Fig. 2.

Fig. 5 is a transverse section taken through the lower end of thecoupling on the line 5--5 in Fig. 2.

Fig. 6 is a view similar to Fig. 1, showing a modification.

Fig. 7 is a longitudinal section taken through the same axially at rightangles to the showing in Fig. 6.

residing at Referring to the drawing 10 designates the lower portion ofa sucker rod which is adapted to be connected to the upper portion 11 ofthev sucker rod. The lower portion 10 terminates at its upper end in anexternally threaded stem 12.adapted to engage in a threaded socket 13formed in the lower end of a couplin member 14. The memberl 14 hasdepressions 15 in o posite sides adapted to receive a wrench or t e likef for lscrewln the member 14 relativelyto the stem 12. he upper end ofthe coupling member 14 is provided with a recess 16 in which is seatedthe head 17 of a bolt 18, the latter being externally threadedthroughout its length. The member 14 has a depression in its outer endwith internal screw threads and a collar 19 is threaded into the socket16 and against the head 17A of the bolt. The collar 19 is turned downagainst the head 17 to the desired extent, the collar 19 having abevelled lower edge and the head 17 being correspondingly bevelled tomeet the surface of the ring 19 for holding the threaded bolt 18 inplace and permitting the free turning of the latter.

The sleeve 19 has Spanner openings 20 therein for facilitating theapplication of a spanner wrench to the ring and turning the same downupon the head 17 to the desired extent. A set screw 21 is threaded intothe side of the coupling member 14 to hold the ring when adjusted. Thelower section 10 of the sucker rod is provided with a collar 22 adaptedto bind against the lower end of the coupling section 14 for locking thelatter to the sucker rod.

A second coupling section 23 of sleeve form is internally threaded andmounted on the stem 18 and turned down thereon into position against theupper end of the coupling section 14, care being taken netto bind theparts against relative turning movement. A collar 24 is also threadedupon the stem 18 and is adapted to be turneddown against the sleeve 23to bind thelatter on the stem when adjusted, and a set'screw 25 isthreaded in the collar to bind against the stem 18 and hold the collarfree om turning. The upper sucker rod section 11 is provided with aninternally threaded head 26 adapted to be Y parts. l

The' upper coupling section 23 is provided in oppositesides withdepressions or transverse fiat faces 27 for receiving a wrench or thelike to facilitate the turning of the section.

It is apparent that the swivel head 17 ermits the relative turning ofthe coup l1n sections 14 and 23 under all conditions an thatthe'coupling maybe used with the ordinary type of sucker rod and maysimply be introduced between the stem 12 and the hollow head 26 of thesucker rod'.

Accordin to the modification shown in Figs. 6 an `7, the couplingsection 28 has been lengthened to include at its upper end a threadedrecess 29 for the reception of the lower threaded end portion or stub 31of the upper rod member 30. The upper4 section 30 of the suckerurod visprovided with a flange 32 adapted to bind against the upper end ofcoupllng section 28 for locking the latter to the sucker rod. f

The coupling section 28 is provided with a set screw 33 threaded in itsside wall and located a suiiicient distance from the upper end ofthecouplin section 28 to bind against the stem 18 and ho d the collar fromturning thereon. .j

The lower portions of this modified form are of similar construction tothe lower portions of the swiveljoint shown by Figs. 1 to 5 inclusive.

It is of course understood that various changes and modifications may bemade in thedetails of construction and design of the above specificembodiment without departing from the spiritthereof, such changes andmodifications' being restricted only by the scope ofthe followingclaims.

What is claimed is:

1. In combination with a sucker rod having a threaded stem'on onesection and a threaded head on the other section, a pair of couplingmembers, vone of said members having a threaded socket' to receive saidstem of the rod section and having a threaded socket in its otherfend. athreaded stem having a swivel head adapted to turn in said second socketof the coupling member a retaining ring threaded in said second socketand against the head for holdin the latter in the socket and permittingthe ead Y to turn, said other coupling member being recess in the upperend, an upper sectiony having a threaded recess therethrough, a threadedbolt having an enlarged head at its lower end and being `adapted toproject through and beyond said upper section, aA

ring threaded in said recess in said lower section and adapted to engagesaid enlarged head of said bolt to retain the same in place, and meansfor securing the upper and lower sections to said sucker rod.

3. The combination with a pair of vsucker rod sections having a stem andthel other having a socket, a pair of swivelled sections arranged toturn one upon the other and including a swivel bolt projecting beyondone of the swivel sections, the projecting end of the bolt being ada tedfor engagement in the socket of oneo vsaid sucker Y rod sections.

4. The combination with a pair of suckerYK swivel section and having athreaded portion extending beyond the adjacent swivel section, means forlocking the swivel headk in its section and locking the other swivelsection upon the threaded stem, the projecting end of said stem beingadapted to engage with the other rod section.

JOSIAH DAVID PRIDGEN.

